1 /* Initialize cpu feature data. PowerPC version. 2 Copyright (C) 2017-2021 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #include <stdint.h> 20 #include <cpu-features.h> 21 22 #if HAVE_TUNABLES 23 # include <elf/dl-tunables.h> 24 #endif 25 26 static inline void init_cpu_features(struct cpu_features * cpu_features)27init_cpu_features (struct cpu_features *cpu_features) 28 { 29 /* Default is to use aligned memory access on optimized function unless 30 tunables is enable, since for this case user can explicit disable 31 unaligned optimizations. */ 32 #if HAVE_TUNABLES 33 int32_t cached_memfunc = TUNABLE_GET (glibc, cpu, cached_memopt, int32_t, 34 NULL); 35 cpu_features->use_cached_memopt = (cached_memfunc > 0); 36 #else 37 cpu_features->use_cached_memopt = false; 38 #endif 39 } 40